Replace reference of NetworkAgent#setLegacyExtraInfo am: ddfc20d4f1 am: b9620b8f56 am: 5a957af21e

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1645031

Change-Id: If4c386e11f2cafda1c9052e7bd9f395213f23ddd
tree: 7ac581c5ea67af3b062c466c140c37d58dbbdd70
  1. service-t/
  2. tests/